Add download, sync, create repo
move shutdown_process to utils/

* also make compile pass on linux
* json_object_foreach is not defined in jansson 2.2.1
split SeafileRpcRequest from SeafileRpcClient
add RepoDetailsView
refresh local repos periodically
added QtAwesome to use FontAwesome icons
improve local repos view
use QLable to display local repo status
add cloud view
improve gui
use sync rpc
improve server repo context menu
improve account button menu
use a tree view to list repos
Handle messages and add bubble notification
Add settings-dialog
Port to xcode and add script for generating app
Add bubble notify support for Mac
Make compile pass
Modify tab css and About window